ACTA IMEKO  ISSN: 2221‐870X  June 2015, Volume 4, Number 2, 1    ACTA IMEKO | www.imeko.org  June 2015 | Volume 4 | Number 2 |  1  Journal contacts    ABOUT THE JOURNAL    Acta IMEKO is an e-journal reporting on the contributions on the state and progress of the science and technology of measurement. The articles are based on presentations presented at IMEKO workshops, symposia and congresses. The journal is published by IMEKO, the International Measurement Confederation. The ISSN, the international identifier for serials, is 2221- 870X.      EDITOR‐IN‐CHIEF  Paolo Carbone, Italy    HONORARY EDITOR‐IN‐CHIEF  Paul P.L. Regtien, Netherlands    EDITORIAL BOARD      Leopoldo Angrisani, Italy Filippo Attivissimo, Italy Eulalia Balestieri, Italy Eric Benoit, France Catalin Damian, Romania Pasquale Daponte, Italy Luigi Ferrigno, Italy Alistair Forbes, United Kingdom Fernando Janeiro, Portugal Konrad Jedrzejewski, Poland Andy Knott, United Kingdom Fabio Leccese, Italy Rosario Morello, Italy Helena Geirinhas Ramos, Portugal Pedro Ramos, Portugal Sergio Rapuano, Italy Dirk Röske, Germany Alexandru Salceanu, Romania Constantin Sarmasanu, Romania Lorenzo Scalise, Italy Emiliano Schena, Italy Enrico Silva, Italy Marco Tarabini, Italy Susanne Toepfer, Germany Rainer Tutsch, Germany Ian Veldman, South Africa Luca De Vito, Italy     ABOUT IMEKO    The International Measurement Confederation, IMEKO, is an international federation of actually 39 national member organisations individually concerned with the advancement of measurement technology. Its fundamental objectives are the promotion of international interchange of scientific and technical information in the field of measurement, and the enhancement of international co-operation among scientists and engineers from research and industry.     ADDRESSES    Principal Contact  Prof. Paolo Carbone University of Perugia Dept. Electr. Inform. Engineering (DIEI) via G.Duranti, 93, 06125 Perugia, Italy email: paolo.carbone@unipg.it    ACTA IMEKO  Prof. Paul P. L. Regtien Measurement Science Consultancy (MSC) Julia Culpstraat 66, 7558 JB Hengelo (OV), The Netherlands email: paul@regtien.net    Support Contact  Dr. Dirk Röske Physikalisch-Technische Bundesanstalt (PTB) Bundesallee 100, 38116 Braunschweig, Germany email: dirk.roeske@ptb.de